From patchwork Thu Nov 11 14:09:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Michel Hautbois X-Patchwork-Id: 14579 Return-Path: X-Original-To: parsemail@patchwork.libcamera.org Delivered-To: parsemail@patchwork.libcamera.org Received: from lancelot.ideasonboard.com (lancelot.ideasonboard.com [92.243.16.209]) by patchwork.libcamera.org (Postfix) with ESMTPS id B0F11BDB1C for ; Thu, 11 Nov 2021 14:09:43 +0000 (UTC) Received: from lancelot.ideasonboard.com (localhost [IPv6:::1]) by lancelot.ideasonboard.com (Postfix) with ESMTP id 5E9BD60378; Thu, 11 Nov 2021 15:09:43 +0100 (CET) Authentication-Results: lancelot.ideasonboard.com; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=ideasonboard.com header.i=@ideasonboard.com header.b="UkTi4oem"; dkim-atps=neutral Received: from perceval.ideasonboard.com (perceval.ideasonboard.com [213.167.242.64]) by lancelot.ideasonboard.com (Postfix) with ESMTPS id F39A860361 for ; Thu, 11 Nov 2021 15:09:32 +0100 (CET) Received: from tatooine.ideasonboard.com (unknown [IPv6:2a01:e0a:169:7140:e627:8337:a781:d98]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id A74411516; Thu, 11 Nov 2021 15:09:32 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1636639772; bh=yWkJdvRSgfXh4qjq9NioC2/JvKEeiIrDVDhZ80AwLCg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UkTi4oem9Taopc8U7zypgt0SXlz+mv79Bl//W70aeIpYCKmHfGKH/qyzc9OUJcc8v Lex3uhWAPg1Pqfrf7hEtrvhtubGvBhK4DoNyLOR78EN59IWq6BOAOQBRN0Ud62nhgO RqekHgI2fotnPDL9Cm5h3DWRXroOE/1V5EQMWVWA= From: Jean-Michel Hautbois To: libcamera-devel@lists.libcamera.org Date: Thu, 11 Nov 2021 15:09:23 +0100 Message-Id: <20211111140928.136111-10-jeanmichel.hautbois@ideasonboard.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211111140928.136111-1-jeanmichel.hautbois@ideasonboard.com> References: <20211111140928.136111-1-jeanmichel.hautbois@ideasonboard.com> MIME-Version: 1.0 Subject: [libcamera-devel] [PATCH v4 09/14] ipa: ipu3: agc: Use exposure in time for storage X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" The minimum and maximum exposure are stored in lines. Replace it by values in time to simplify the calculations. Signed-off-by: Jean-Michel Hautbois Reviewed-by: Kieran Bingham Reviewed-by: Umang Jain Reviewed-by: Paul Elder --- src/ipa/ipu3/algorithms/agc.cpp | 21 +++++++++------------ src/ipa/ipu3/algorithms/agc.h | 4 ++-- 2 files changed, 11 insertions(+), 14 deletions(-) diff --git a/src/ipa/ipu3/algorithms/agc.cpp b/src/ipa/ipu3/algorithms/agc.cpp index d736f21c..86b71886 100644 --- a/src/ipa/ipu3/algorithms/agc.cpp +++ b/src/ipa/ipu3/algorithms/agc.cpp @@ -79,8 +79,8 @@ static constexpr uint32_t kMaxLuminance = 255; static constexpr double kNormalizedLumaTarget = 0.16; Agc::Agc() - : frameCount_(0), iqMean_(0.0), lineDuration_(0s), minExposureLines_(0), - maxExposureLines_(0), filteredExposure_(0s), currentExposure_(0s) + : frameCount_(0), iqMean_(0.0), lineDuration_(0s), minShutterSpeed_(0s), + maxShutterSpeed_(0s), filteredExposure_(0s), currentExposure_(0s) { } @@ -99,17 +99,16 @@ int Agc::configure(IPAContext &context, const IPAConfigInfo &configInfo) lineDuration_ = configInfo.sensorInfo.lineLength * 1.0s / configInfo.sensorInfo.pixelRate; - /* \todo replace the exposure in lines storage with time based ones. */ - minExposureLines_ = context.configuration.agc.minShutterSpeed / lineDuration_; - maxExposureLines_ = std::min(context.configuration.agc.maxShutterSpeed / lineDuration_, - kMaxShutterSpeed / lineDuration_); + minShutterSpeed_ = context.configuration.agc.minShutterSpeed; + maxShutterSpeed_ = std::min(context.configuration.agc.maxShutterSpeed, + kMaxShutterSpeed); minAnalogueGain_ = std::max(context.configuration.agc.minAnalogueGain, kMinAnalogueGain); maxAnalogueGain_ = std::min(context.configuration.agc.maxAnalogueGain, kMaxAnalogueGain); /* Configure the default exposure and gain. */ context.frameContext.agc.gain = minAnalogueGain_; - context.frameContext.agc.exposure = minExposureLines_; + context.frameContext.agc.exposure = minShutterSpeed_ / lineDuration_; return 0; } @@ -242,11 +241,9 @@ void Agc::computeExposure(IPAFrameContext &frameContext, double currentYGain) * exposure value applied multiplied by the new estimated gain. */ currentExposure_ = effectiveExposureValue * evGain; - utils::Duration minShutterSpeed = minExposureLines_ * lineDuration_; - utils::Duration maxShutterSpeed = maxExposureLines_ * lineDuration_; /* Clamp the exposure value to the min and max authorized */ - utils::Duration maxTotalExposure = maxShutterSpeed * maxAnalogueGain_; + utils::Duration maxTotalExposure = maxShutterSpeed_ * maxAnalogueGain_; currentExposure_ = std::min(currentExposure_, maxTotalExposure); LOG(IPU3Agc, Debug) << "Target total exposure " << currentExposure_ << ", maximum is " << maxTotalExposure; @@ -256,14 +253,14 @@ void Agc::computeExposure(IPAFrameContext &frameContext, double currentYGain) /* Divide the exposure value as new exposure and gain values */ utils::Duration exposureValue = filteredExposure_; - utils::Duration shutterTime = minShutterSpeed; + utils::Duration shutterTime; /* * Push the shutter time up to the maximum first, and only then * increase the gain. */ shutterTime = std::clamp(exposureValue / minAnalogueGain_, - minShutterSpeed, maxShutterSpeed); + minShutterSpeed_, maxShutterSpeed_); double stepGain = std::clamp(exposureValue / shutterTime, minAnalogueGain_, maxAnalogueGain_); LOG(IPU3Agc, Debug) << "Divided up shutter and gain are " diff --git a/src/ipa/ipu3/algorithms/agc.h b/src/ipa/ipu3/algorithms/agc.h index 1d085b40..f14d56b7 100644 --- a/src/ipa/ipu3/algorithms/agc.h +++ b/src/ipa/ipu3/algorithms/agc.h @@ -46,8 +46,8 @@ private: double iqMean_; utils::Duration lineDuration_; - uint32_t minExposureLines_; - uint32_t maxExposureLines_; + utils::Duration minShutterSpeed_; + utils::Duration maxShutterSpeed_; double minAnalogueGain_; double maxAnalogueGain_;